Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
63°F
17°C
| Humidity | 86% |
| Wind Speed | S 10 mph |
| Barometer | 29.85 in |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 10 Mar 12:55 am CDT |
Extended Forecast for
Dorchester IL
Overnight

Low: 60 °F
Mostly Clear
Tuesday
High: 80 °F
Sunny then
Mostly Sunny
and BreezyTuesday Night
Low: 51 °F
Slight Chance
T-storms then
T-stormsWednesday
High: 66 °F⇓
Breezy.
T-storms then
ShowersWednesday Night

Low: 30 °F
Mostly Cloudy
Thursday

High: 51 °F
Sunny
Thursday Night

Low: 42 °F
Mostly Cloudy
Friday

High: 59 °F
Mostly Cloudy
Friday Night

Low: 38 °F
Mostly Cloudy
Detailed Forecast
Overnight
Mostly clear, with a low around 60. South wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 80. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 51. Southwest wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm before 2pm, then showers likely. Temperature falling to around 47 by 5pm. Breezy, with a southwest wind 15 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 30. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 25 mph.
Thursday
Sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 59.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 48.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 62. Breezy.
Sunday Night
A chance of rain and snow. Partly cloudy, with a low around 26. Blustery. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 38.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Dorchester IL
39.1°N 89.87°W (Elev. 659 ft)
39.1°N 89.87°W (Elev. 659 ft)
11:41 pm CDT Mar 9, 2026
1am CDT Mar 10, 2026-6pm CDT Mar 16, 2026


